A well-stocked team — but enough about 2013 season

Before they addressed some needs along the offensive line and in their linebacker corps on the final day of the NFL draft Saturday, the 49ers got a jump start on the 2013 draft.

After trading out of the third round Friday, and netting a 2013 fifth-round pick from the Colts, 49ers general manager Trent Baalke kept dealing. Two trades later, he’d turned Friday’s third-round pick into five selections: two sixth-rounders this year and third-, fifth- and sixth-round picks in 2013 when San Francisco will have 11 selections.

Without drafting a player, the future became even brighter.

“It’s all about value,” Baalke said. “We feel good about the depth.”

Indeed, given the 49ers’ well-stocked roster, Baalke could afford to make some deals. But he eventually went to work on filling a few holes.

Baalke began by trading up eight spots in the fourth round to select Wake Forest guard Joe Looney, an all-acc secondteam pick last year who slid down draft boards due to a Lisfranc foot injury he suffered at the Senior Bowl. Looney is expected to compete for the starting spot at right guard, which opened when Adam Snyder signed with the Cardinals.

Looney, who spent a week in January working with former 49ers center Jeremy Newberry, was credited with 73.5 knockdown blocks as a senior.

“I love pulling around, coming up on linebackers,” Looney said. “I feel like that’s an offensive lineman’s time to shine.”

With their fifth- and seventh-round picks, the 49ers selected Notre Dame outside linebacker Darius Fleming and Virginia outside linebacker Cam Johnson, respectively. They should provide depth along with Parys Haralson, who had been the lone backup on the roster behind expected starters Aldon Smith and Ahmad Brooks.

With the first of two sixthround picks, San Francisco addressed more defensive depth with Michigan State safety Trenton Richardson, who, at 5-foot-10, earned firstteam all-big Ten honors as a senior.

“If you watch my film, and you watch how I play, and you watch how I move around to the ball, you can see that my size really doesn’t affect the way that I play the game,” Richardson said.

With their final sixth-round selection, the 49ers took Western Oregon center Jason Slowey, whose rise from Division II to NFL draftee included countless hours in the weight room. Slowey said he could do three reps of 225 pounds on the bench press as a freshman. He put up 38 reps at his pro day. Owusu signs: Stanford wide receiver Chris Owusu signed with the 49ers as an undrafted free agent, his agent confirmed. Projected as at least a midround pick prior to his senior season, Owusu went undrafted after he had three concussions in his final two seasons. Owusu’s teammates, Stanford defensive lineman Matt Masifilo and safety Michael Thomas, signed free-agent contracts with the 49ers.

There were a series of other unofficial free-agent signings, reported by athletes and agents, via Twitter: Northwestern

College:

Hometown: Of note: Was a second-team Division II All-american as a senior. … Was a four-time conference champion in the shot put. … His visit with the 49ers was his only predraft trip. G Al Netter; Wisconsin DT Patrick Butrym; Michigan State TE Garrett Celek; Purdue OLB Joe Holland; Northern Illinois WR Nathan Palmer and Southern Illinois RB Jewel Hampton.